a strip 2cm broad along the sides of sheet of paper which is 20cm long and 10cm broad has been coloured What is the area of coloured part?
20*10 - 16*6 = ?
104 sq cm
To find the area of the colored part, we need to subtract the area of the strip that has not been colored from the total area of the paper.
First, let's find the area of the strip:
Since the strip is 2cm wide along each side of the sheet, the area of the strip will be the sum of the areas of the two side strips.
Area of one strip = 2cm x 20cm = 40 cm²
Since there are two side strips, the total area of the strip will be 2 x 40cm² = 80 cm².
Next, let's calculate the total area of the paper:
The total area of the paper is given by its length multiplied by its breadth.
Total area of the paper = 20cm x 10cm = 200 cm².
Finally, to find the area of the colored part, we subtract the area of the strip from the total area of the paper:
Area of colored part = Total area of the paper - Area of the strip
Area of colored part = 200 cm² - 80 cm² = 120 cm².
Therefore, the area of the colored part is 120 cm².